82222217 has 32 divisors (see below), whose sum is σ = 113301504. Its totient is φ = 57657600.

The previous prime is 82222193. The next prime is 82222219. The reversal of 82222217 is 71222228.

It is not a de Polignac number, because 82222217 - 2²⁰ = 81173641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28742 + ... + 31472.

It is an arithmetic number, because the mean of its divisors is an integer number (3540672).

Almost surely, 2^82222217 is an apocalyptic number.

It is an amenable number.

82222217 is a deficient number, since it is larger than the sum of its proper divisors (31079287).

82222217 is a wasteful number, since it uses less digits than its factorization.

82222217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789.

The product of its digits is 1792, while the sum is 26.

The square root of 82222217 is about 9067.6467178646. The cubic root of 82222217 is about 434.8402408007.

It can be divided in two parts, 8222221 and 7, that added together give a palindrome (8222228).

The spelling of 82222217 in words is "eighty-two million, two hundred twenty-two thousand, two hundred seventeen".